Improvement in balanced steam-valves



D. C. STOTTS.

BALANCED STEAM-VALVES.

No. 194,481. Patented Aug. 21,1877.

0D 2 I v G ug /J7' WITNESSES INVENTOR ATTORN EYS;

NJETERS PHOTO-LITHOGRAPHER, WASHINGTON D C UNITED STATES PATENT Orrrcn.

DAVID C. STOTTS, OF SAVANNAH,MISSOUBI.

IMPROVEMENT IN BALANCED STEAM-VALVES.

Specification forming part of Letters Patent No. 194,481, dated August21, 1877; application filed November 18, 1876.

To all whom it may concern:

Be it known that I, DAVID C. STO'JJTS, of Savannah, in the county ofBuchanan and State of Missouri, have invented a new and valuableImprovement in Balanced Steam- Valves; and I hereby declare that the'following a full, clear, and exact description of the construction andoperation of the same, reference being had to the annexed drawings,making a part of this specification, and to the letters and figures ofreference marked thereon.

Figure 1 of the drawings is a perspective view of my balancedsteam-valve. Fig. 2 is a vertical section of the same. Figs. 3, 4., and5 are detail views.

This invention consists in certain improvements in the construction ofbalanced steamvalves, as will be hereinafter more'fully set forth, andpointed out in the claims.

On the annexed drawings, A represents the valve, to which the rod whichoperates it is attached. The upper side of this valve is rounded, and isprovided with transverse grooves A A, which cross each other, in whichthe two springsB B are placed. These springs B B are arranged insaidgrooves for the purpose of raising or lowering the top of the valveplateG. The center of these springs B B rests upon a set-screw, a, which issecured to the valve A at or near its center. 0 is a circular plate,which is rigidly secured to the valve A by bolts b. Through this plateare holes D D for the purpose of oiling the valveseat, the oil passingdown through the perforations ff in the valve and out of the same on theface of the valve and valve-seat.

The plate 0 is provided with a set-screw, E, by which the springs B Bare adjusted and the pressure upon the top of the valve regulated. Thisplate is also provided with two upright projections, H H, which keepsthe plate G on the top of the valve from displacement. The plateG'presses upon the upper side of the steam-chest. This plate is providedwith an opening in its center. The object of this opening is to haveeasy access to the springadjusting thumb-screw E.

Upon the ends of the springs B B rests a metallic packing-ring, F, theends of which are lapped over each other. On one of the under sides ofthis packing-ringalip, d, is left, which lip fits into a recess, 0, onthe other end of the packing'ring. By means of this packing-ring thesteam is prevented from passing into the space left between the plates 0and G, and

creating a pressure upon the top of the valve.' What I claim as new, anddesire to secureby Letters Patent, is-

- l. Thevalve A, provided with transverse grooves A A, in combinationwith springs B, ring F, and plate Gr, substantially as described, andfor the purpose set forth.

2. In a balanced steam-valve, the plate 0, having lubricating holes D D,passages ff, and set-screw E, in combination with springs B B and valveA, substantially as described, and for the purpose set forth.

3. In a balanced steam-valve, the valve A, having transverse grooves AA, adjustingsprings B B, metallic packing-ring F,'in combination withplates 0 G, all constructed substantially as described, and for thepurposes set forth.

In testimony that I claim the above I have hereunto subscribed my namein the presence of two witnesses.

, DAVID C. STOTTS. Witnesses:

J. R. CALDWELL,

NICHOLAS KIRTLY.

